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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Hi guys i need help



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      01-12-2024, 02:45 AM   #1
Irvine335
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Hi guys i need help

I got a 335i and I want to do a twin turbo upgrade with a lot of power but I don’t know any realizable brands or on what to do step by step would I need to upgrade other components I have replaced almost every common faliure point now I just want to know how can I flash and tune it or what to do after I install them to avoid taking damage
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      01-12-2024, 06:32 AM   #2
SlowE92
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Quote:
Originally Posted by Irvine335 View Post
I got a 335i and I want to do a twin turbo upgrade with a lot of power but I don’t know any realizable brands or on what to do step by step would I need to upgrade other components I have replaced almost every common faliure point now I just want to know how can I flash and tune it or what to do after I install them to avoid taking damage
If you've addressed every common failing point and the car is mechanically sound. What other modifications are done to the car? It's usually recommended to go full bolt on before upgrading turbos, and that includes upgrading the fuel system as well.
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2007 E92 335i - MHD, Turbo Technics 19T's
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      01-12-2024, 10:18 AM   #3
Irvine335
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I have charge pipe the two cone inlets and I’m cat less down pipe I recently replaced opg vcg ofhg coils packs and spark plugs and the water pump
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      01-12-2024, 11:36 AM   #4
whyzee125
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RB and pure are the only twins that have been proven to be reliable. You can’t go wrong with either one. I think you mean dual cone intakes, so for upgraded turbos you will also want to get inlets and a large FMIC of your choice.

From there you will need a custom tune (MHD is the only way to go now) and depending on your power goals and fuel of choice you may need to upgrade your fueling too. For pump gas and high hp, you’d need something like a stage 2 single pump (walbro 535) or if you want to run ethanol mixes you’d more than likely need a twin pump setup.
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